Malicious PDF — malware analysis report

Static analysis result for SHA-256 ded072df086c26df…

MALICIOUS

PDF

35.6 KB Created: 2020-08-20 00:10:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbd8a9f63d3a592660b06a2b97d4e1cc SHA-1: 3a68326911d5bbd57529e4be24b2e1971b1e4e0a SHA-256: ded072df086c26dff4205f2033d3109f5c52ab09caa9861f372f95bbc63da918
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to lure users into clicking on the malicious URL. The document body, though heavily obfuscated, contains text related to 'Regal hotels international holdings ltd annual report' and the malicious URL, suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=regal+hotels+international+holdings+ltd+annual+report
    • http://modux.safeketozone.com/uploads/1/3/0/7/130776445/7482991.pdf
    • http://files.theheritagetourism.com/uploads/1/3/1/4/131410094/f06227e08d6.pdf
    • http://bujamege.flyingtigerentertainment.com/uploads/1/3/1/8/131856257/lepeseloxes.pdf
    • https://cdn.shopify.com/s/files/1/0437/8673/1671/files/56043842462.pdf
    • https://cdn.shopify.com/s/files/1/0429/6248/5407/files/bazipopov.pdf
    • https://cdn.shopify.com/s/files/1/0435/2845/4296/files/alman_dili_qrammatika_kitabi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/moment_js_time_format_am_pm.pdf
    • https://cdn.shopify.com/s/files/1/0432/5844/5979/files/89665587455.pdf
    • https://cdn.shopify.com/s/files/1/0430/1121/1425/files/estrategia_corporativa.pdf
    • https://cdn.shopify.com/s/files/1/0428/2744/8476/files/64211692191.pdf
    • https://cdn.shopify.com/s/files/1/0435/4283/9455/files/conceptos_basicos_de_alimentacion_y_nutricion.pdf
    • https://cdn.shopify.com/s/files/1/0435/7488/6563/files/ruvunujojowuwabogawa.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5082/files/puroset.pdf
    • https://cdn.shopify.com/s/files/1/0434/3431/1845/files/30471291880.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000042c3.bin
218615c96ca80467247facc766f9c2f2584948c92711c8aede41886f3cdaaaab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x42C3 2984 bytes
font_01_sfnt_off00004d72.bin
7a6677c274a0de5391402eb6a82260d5701f380635fee22d06b0d7d37ad97830		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D72 5228 bytes
font_02_sfnt_off00005f2d.bin
6128be91d109a4818d3a1659821341c8075a7047293042a4cbfecbd4515d53fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2D 9808 bytes

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